Newegg offers the refurbished iRobot Roomba 650 Robotic Vacuum Cleaner in Black, model no. R650020, for $229.99 with free shipping. That's $4 under our expired mention of a new one from Black Friday week and the lowest we've seen in any condition. (It's $70 under the best we could find for a new one today.) This 3.6"-tall vacuum features a 3-stage cleaning system, iAdapt Navigation, virtual wall technology, object avoidance, 10-1/2" cleaning path, and on-board scheduling. Deal ends December 5.

A 90-day warranty applies, although it is unclear who backs it.